Too few events selected for hhmumu

[lyazj]

TODOs:

• Check Delphes card.
• Apply tighter (e.g., 0.15) isolation cut on muons.
• Other selection criteria fitting.

[lyazj]

Less than ~0.1% events have >2 muons, so no need for a tighter isolation cut.

[lyazj]

Solved.

It's an issue from fake neutrino (MET) veto. Now the veto is removed.